/Engine/Plugins/Runtime/GeometryProcessing/Source/DynamicMesh/Public/Parameterization/DynamicMeshUVEditor.h
Create new UV island for each Triangle, by planar projection onto plane of Triangle. No transforms/etc are applied.
void SetPerTriangleUVs ( const [TArray](API\Runtime\Core\Containers\TArray)< int32 > & Triangles, double ScaleFactor, [FUVEditResult](API\Plugins\DynamicMesh\Parameterization\FUVEditResult) * Result )